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Commit5ed8b4a

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Fix instance of elog() called while holding a spinlock
This broke the project rule to not call any complex code while aspinlock is held. Issue introduced byb89e151.Discussion:https://postgr.es/m/20200602.161518.1399689010416646074.horikyota.ntt@gmail.comBackpatch-through: 9.5
1 parent0c735c6 commit5ed8b4a

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‎src/backend/replication/logical/logical.c

Lines changed: 16 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -887,25 +887,33 @@ LogicalIncreaseRestartDecodingForSlot(XLogRecPtr current_lsn, XLogRecPtr restart
887887
{
888888
slot->candidate_restart_valid=current_lsn;
889889
slot->candidate_restart_lsn=restart_lsn;
890+
SpinLockRelease(&slot->mutex);
890891

891892
elog(DEBUG1,"got new restart lsn %X/%X at %X/%X",
892893
(uint32) (restart_lsn >>32), (uint32)restart_lsn,
893894
(uint32) (current_lsn >>32), (uint32)current_lsn);
894895
}
895896
else
896897
{
898+
XLogRecPtrcandidate_restart_lsn;
899+
XLogRecPtrcandidate_restart_valid;
900+
XLogRecPtrconfirmed_flush;
901+
902+
candidate_restart_lsn=slot->candidate_restart_lsn;
903+
candidate_restart_valid=slot->candidate_restart_valid;
904+
confirmed_flush=slot->data.confirmed_flush;
905+
SpinLockRelease(&slot->mutex);
906+
897907
elog(DEBUG1,"failed to increase restart lsn: proposed %X/%X, after %X/%X, current candidate %X/%X, current after %X/%X, flushed up to %X/%X",
898908
(uint32) (restart_lsn >>32), (uint32)restart_lsn,
899909
(uint32) (current_lsn >>32), (uint32)current_lsn,
900-
(uint32) (slot->candidate_restart_lsn >>32),
901-
(uint32)slot->candidate_restart_lsn,
902-
(uint32) (slot->candidate_restart_valid >>32),
903-
(uint32)slot->candidate_restart_valid,
904-
(uint32) (slot->data.confirmed_flush >>32),
905-
(uint32)slot->data.confirmed_flush
906-
);
910+
(uint32) (candidate_restart_lsn >>32),
911+
(uint32)candidate_restart_lsn,
912+
(uint32) (candidate_restart_valid >>32),
913+
(uint32)candidate_restart_valid,
914+
(uint32) (confirmed_flush >>32),
915+
(uint32)confirmed_flush);
907916
}
908-
SpinLockRelease(&slot->mutex);
909917

910918
/* candidates are already valid with the current flush position, apply */
911919
if (updated_lsn)

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